JP7704626B2 - Overhead door body - Google Patents

Description

The present invention relates to overhead doors, and more specifically to overhead door bodies with excellent wind pressure resistance.

Overhead doors are known as fixtures that are installed in building openings that connect the outside and inside of buildings such as warehouses and garages. The door body of an overhead door is formed by connecting multiple sections, and guide rollers are provided at both ends of the width of each section. The guide rollers are guided by left and right guide rails and move up and down to open and close the building opening.

When an overhead door is exposed to high wind pressure when the opening is fully closed, the central part of each section may bend or a force may be applied that causes the central part of each section to expand vertically, which may cause the components that make up each section (e.g., upper frame, lower frame, main body, etc.) to deform or the fastening parts to come loose.
Patent Publication No. 2020-122339

The present invention aims to provide an overhead door body with excellent wind pressure resistance.

The technical means adopted in the present invention are:
In an overhead door body formed by connecting a plurality of sections in the height direction,
Each section includes a main body, left and right vertical frames, an upper end portion, a lower end portion, and a plurality of center frames extending between the upper end portion and the lower end portion.
The center frames are arranged more densely at the center in the width direction of each section than at both ends in the width direction.
This is the body of an overhead door.
In one embodiment, the upper end portion of the section is a stile and the lower end portion is a stile.

In one aspect, the plurality of center frames are arranged at equal intervals in the width direction of the section, and include a plurality of first center frames equipped with hinges for connecting adjacent sections vertically;
A plurality of second center frames are disposed between the plurality of first center frames located in the center portion in the width direction, and have no hinges attached thereto;
It consists of:

In one embodiment, in each section, there are two or three second stiles.

In the present invention, in each section of an overhead door, the center frames are densely positioned toward the center of the width of each section (the area that is most susceptible to deflection when subjected to wind pressure) compared to both ends of the width of each section, thereby suppressing the vertical opening of the sections and minimizing the risk of the components that make up each section deforming or the fastening parts coming loose.
Depending on the strength required for the overhead door body, the required number of center frames can be incorporated into each section, making it possible to improve the strength of the sections while minimizing the weight increase associated with adding center frames.

FIG. 2 is a front view of the overhead door in a fully closed position as viewed from the inside of the vehicle. FIG. 2 is a side view of the overhead door in a fully closed position. 2 is a partially enlarged plan view showing the opening width direction end of the overhead door in a fully closed position. FIG. FIG. 2 is a front view of the door body of the overhead door according to the present embodiment, as viewed from the inside of the vehicle. FIG. 5 is a partial enlarged view of a widthwise end portion of the top section in FIG. 4. FIG. 5 is a partial enlarged view of a width direction end portion of the intermediate section in FIG. 4 . FIG. 2 is a side view of the overhead door body. FIG. 11 is a front view of an overhead door body according to another embodiment, as viewed from the inside of the vehicle. 13 is a front view of an overhead door body according to still another embodiment, as viewed from the inside of the vehicle. FIG. 1A and 1B are front views of the intermediate section according to this embodiment, the upper view being a front view seen from the outside of the room, and the lower view being a front view seen from the inside of the room. FIG. 11 is a partially enlarged view of the lower part of FIG. FIG. 2 is a longitudinal cross-sectional view of the intermediate section according to the embodiment. FIG. 4 is a partial vertical cross-sectional view of the intermediate section according to the embodiment. FIG. 4 is a plan view of the intermediate section according to the embodiment. FIG. 4 is a partially enlarged plan view of the intermediate section according to the embodiment. FIG. 4 is a partially enlarged plan view of the intermediate section according to the embodiment. A diagram showing the center frame related to this embodiment. A side view showing the lower frame of this embodiment. This is a diagram showing the lower frame of this embodiment, where the upper figure is a plan view and the lower figure is a front view seen from the inside of the room. The upper figure is a side view showing the attachment attached to the reinforcing portion of the lower frame in this embodiment, and the lower figure is a side view of the attachment in this embodiment. FIG. 2 is a diagram showing an attachment according to the present embodiment. FIG. 11 is a longitudinal cross-sectional view of an intermediate section according to another embodiment. FIG. 13 is a plan view of an intermediate section according to another embodiment. A partially enlarged longitudinal cross-sectional view of the lower stile of the intermediate section according to another embodiment. A diagram showing a reinforcement material incorporated into the bottom stile of the mid-section in this embodiment. A diagram illustrating a solid type lower frame. This is a front view of the top section of this embodiment, where the upper figure is a front view seen from the outside of the room and the lower figure is a front view seen from the inside of the room. FIG. 2 is a vertical cross-sectional view of the top section according to the embodiment. FIG. 2 is a partially enlarged vertical cross-sectional view of the top section according to the embodiment. FIG. 2 is a plan view of the top section according to the embodiment. A figure showing a first embodiment of a reinforcing material to be incorporated into the upper frame of the top section in this embodiment. FIG. 13 is a plan view of a top section according to another embodiment. FIG. 11 shows a second embodiment of a reinforcement member incorporated into the upper stile of the top section according to another embodiment. This is a partial front view of two adjacent sections (a top section and a middle section) seen from the inside of the room. FIG. 35 is a side view of FIG. FIG. 35 is a longitudinal cross-sectional view of FIG. 34 . FIG. 36 is a partially enlarged view of FIG. 35 . FIG. 37 is a partially enlarged view of FIG. 36 . The lower figure is a partially enlarged view of the width direction end portion of the top section in FIG. 34, and the upper figure is a top view of the partially enlarged view. FIG. 35 is a partially enlarged plan view of a widthwise end portion of the intermediate section in FIG. 34. 11A and 11B are diagrams illustrating the conditions required for curved portions on the base end sides of side edges at both ends in the width direction of a reinforcing portion. 4A to 4C are diagrams illustrating a mounting structure of a top roller bracket. 4A to 4C are diagrams illustrating a mounting structure of a roller bracket. This is a front view of the intermediate section equipped with the locking mechanism as seen from the inside of the vehicle. This is a diagram showing the latch and latch hook of the locking mechanism, with the upper figure being a plan view and the lower figure being a front view. This is a diagram showing the operating part of the locking mechanism, where the left figure is a vertical cross-sectional view, the center figure is a front view seen from the inside of the room, and the right figure is a front view seen from the outside of the room. This is a front view of the width direction end portion of the intermediate section equipped with a locking mechanism as seen from the inside of the vehicle. FIG. 13 shows mid-section stile with locking mechanism.

[A] Overall structure of overhead door Fig. 1 is a front view of an overhead door in a fully closed position as seen from inside the room, and Fig. 2 is a side view of the overhead door. The door body D of the overhead door is composed of multiple horizontally rectangular sections 1 rotatably connected in the height direction by hinges 16, 16'. Guide rollers 11 are rotatably provided on both ends of the width direction of each section 1 (see Fig. 3), and the door body D opens and closes the building opening by raising and lowering the left and right guide rollers 11 of each section 1 guided by the left and right guide rails G, respectively.

As shown in Figures 10 and 12, the section 1 is composed of a horizontally rectangular main body 10 that extends across almost the entire width of the building opening, a long upper frame 2 located at the upper end of the main body 10 and extending horizontally across the entire width of the section 1, a long lower frame 3 located at the lower end of the main body 10 and extending horizontally across the entire width of the section 1, left and right vertical frames 4 that connect the widthwise ends of the upper frame 2 and the lower frame 3 in the height direction, and multiple center frames 5 that connect predetermined intermediate portions of the upper frame 2 and the lower frame 3 in the height direction. In this embodiment, an end center frame or inner vertical frame 4' is provided adjacent to the inside of the vertical frame 4. The inner vertical frame 4' and the center frame 5 may be partially connected to the main body 10.

In this specification, section 1 includes a top section, a middle section, and a bottom section. Please note that when the top section is the focus of the description, it may be referred to as a "top section 1'" and when the bottom section is the focus of the description, it may be referred to as a "bottom section 1" and may be distinguished from the middle section 1. A reinforcing part 6 for improving wind pressure resistance is integrally formed on the lower frame 3 of section 1 (top section, middle section, bottom section). The top section 1' differs from the other sections 1 in that the reinforcing part 6 is integrally formed on the lower frame 3 and that the reinforcing part 6' is integrally formed on the upper frame 2. The bottom section 1'' differs from the other sections 1 in that a bottom member B made of rubber or resin is attached to the lower end surface, that it has a connecting part 18 to which the lower end of the wire 15 is connected, and that it has an emergency fall prevention device 19 in case the wire is cut, but its basic shape is the same as the middle section 1.

In the door body D, the interior parts of the vertically adjacent sections 1 are connected via hinges 16, 16', and the vertically adjacent sections 1 can rotate around the rotation axis of the hinges 16, 16'. More specifically, the hinge 16 is provided to straddle the interior facing parts 42 of the vertical frames 4 and the inner vertical frames 4' of the vertically adjacent sections 1 (Figures 4, 6, 8, 9, 34, 35, etc.), and the hinge 16' is provided to straddle the surface part 50, which is the interior facing surface of the middle frame 5 of the lower section 1 of the vertically adjacent sections 1, and the lower horizontal surface 63 on the base end side of the reinforcement part 6 protruding from the interior side part 32 of the bottom frame 3 of the upper section 1 (see Figures 4, 8, 9, 36, 38).

In the door body D, the lower end surface of the upper section 1 and the upper end surface of the lower section 1 of the vertically adjacent sections 1 are shaped to fit together when the opening is in a fully closed position. In this embodiment, the stepped lower end surface and upper end surface fit together (see Figures 7, 35 to 38), but for example, a concave lower end surface and a convex upper end surface may fit together.

As shown in Figure 2, the guide rail G consists of a first portion G1 extending in the height direction of the opening, a curved second portion G2 extending rearward from above the first portion G1 toward the inside of the room, and a third portion G3 extending rearward from behind the second portion G2 along the ceiling CL. The first portion G1 slopes gently from bottom to top toward the inside of the room. The third portion G3 slopes gently upward toward the inside of the room.

When the opening is fully closed, each section 1 is positioned at the first part G1 of the guide rail G, so that the multiple sections 1 are in a nearly vertical position and close the opening. From the fully closed state, each section 1 is raised from a nearly vertical position to a nearly horizontal position (gently inclined position) at the third part G3 (the lowest bottom section 1'' is positioned at the second part G2), and the door body is in a position extending horizontally along the ceiling CL of the indoor space, and the opening is fully open.

A rotating shaft 13 equipped with a balance spring 12 is disposed above the building opening, and one end of a winding wire 15 is fixed to a drum 14 supported at both ends of the rotating shaft 13. The other end of the winding wire 15 is connected to both the left and right ends of the bottom section 1'', so that the winding force of the balance spring 12 urges the door body, which is in a fully closed position, in the opening direction (upward).

Please note that in this specification, the terms "outdoor side" and "indoor side" are not only used to mean that a certain element actually faces or is located outdoors or indoors, but are also used to define the relative positional relationship of multiple members. Furthermore, the expressions "upper" and "lower" define the elements of a section based on the section being in a vertical position. The section configurations described below are merely examples and do not limit the content of the present invention.

[B] Overview of the Sections of the Overhead Door The details of the configuration of the section 1 constituting the door body D of the overhead door will be described mainly based on the middle section 1. The figures related to the middle section 1 according to this embodiment are mainly shown in Figs. 10 to 25, but it should be noted that there are several different modes. Although the reinforcing part 6 is protruded from the inside of the bottom frame 3, there are modes in which the attachment 7 is attached to the tip part of the inside of the reinforcement part 6 (Figs. 20 and 21) and modes in which the attachment 7 is not attached (Figs. 12 and 13). Furthermore, there are modes in which the middle frames 5 of the bottom frame 3 are arranged at equal intervals in the width direction (Fig. 4), and modes in which the middle frames 5 are densely arranged in the center part in the width direction (Figs. 1, 8, and 9). It should be noted that these modes are not only applicable to the bottom frame 3 of the middle section 1, but can also be applied to the bottom frame 3 of the top section 1' and the bottom frame 3 of the bottom section 1''.

The main body 10 of the section 1 will now be described. As shown in Figures 10 and 12, the main body 10 of the section 1 is a long plate extending across almost the entire width of the section 1, and an upper frame 2, a lower frame 3, and left and right vertical frames 4 are provided on all four sides of the main body 10, and an inner vertical frame 4' and a center frame 5 are provided on the indoor side of the main body 10 to bridge the upper frame 2 and the lower frame 3.

In this embodiment, the main body 10 is a plate body bent into a wavy (uneven) shape when viewed from the side or in a cross section. The main body 10 of section 1 according to this embodiment is made of steel, and is constructed by bending a steel plate into a predetermined shape. As shown in Figures 11 and 12, the main body 10 of section 1 is composed of an upper vertical surface portion 100, a central vertical surface portion 101, and a lower vertical surface portion 102, which are spaced apart in the height direction in the outdoor portion, and two trapezoidal convex portions 103, one above the other, which are located between the upper vertical surface portion 100 and the central vertical surface portion 101 and between the central vertical surface portion 101 and the lower vertical surface portion 102 and protrude toward the indoor side, and the vertical surfaces of the convex portions 103 on the indoor side are the upper intermediate surface portion 104 and the lower intermediate surface portion 104 of the main body 10. The main body 10 has an upper vertical surface portion 100, a central vertical surface portion 101, and a lower vertical surface portion 102 located on the outdoor side, and an upper intermediate surface portion 104 and a lower intermediate surface portion 104 located on the indoor side. The shape of the main body 10 shown in the figure is an example, and the configuration of the main body 10 of section 1 is not limited to the shape shown in the figure.

In section 1 according to this embodiment, the upper frame 2, lower frame 3, left and right vertical frames 4, inner vertical frame 4', and center frame 5 are formed from aluminum moldings. The upper frame 2 and lower frame 3 according to this embodiment are hollow-type frames formed in a hollow shape, but they may also be solid-type frames that do not have a hollow portion (see FIG. 26).

[C] The upper frame 2 of the overhead door section will now be described. The structure of the upper frame 2 of the middle section 1 and the structure of the upper frame 2 of the top section 1' are substantially the same except that the latter is provided with a reinforcing portion 6', so here, the upper frame 2 of section 1 will be described with reference to the upper frame 2 of the top section 1.

12 and 29, the upper frame 2 of the middle section 1 has an upper surface 20, an exterior side surface 21 which is the exterior facing surface, a vertical indoor side surface 22 which is the interior facing surface, and a horizontal lower surface 23, and the upper surface 20 of the upper frame 2 forms the upper surface of the section 1. The hollow portion surrounded by the upper surface 20, the exterior side surface 21, the interior side surface 22, and the lower surface 23 extends across the entire width of the long upper frame 2. The upper surface 20 is formed in a stepped shape from an exterior horizontal surface 200, an interior horizontal surface 201 which extends horizontally at a position higher than the horizontal surface 200, and an intermediate vertical surface 202 which connects the exterior horizontal surface 200 and the interior horizontal surface 201. The exterior side surface 21 consists of a lower vertical surface 210 and a concave surface 211 that is integrally formed above the vertical surface 210 and has a U-shaped cross-sectional shape.

The tip of the outdoor horizontal surface 200 of the upper surface 20 protrudes slightly outside the room beyond the vertical surface 210 of the outdoor side surface portion 21, and a hanging piece 24 is formed at the tip of the outdoor horizontal surface 200 of the upper surface 20. The first surface on the outdoor side of the upper vertical surface portion 100 of the main body 10 abuts against the inner surface of the hanging piece 24, and the second surface on the indoor side of the upper vertical surface portion 100 abuts against the outer surface of the vertical surface 210, and is fixed to the upper frame 2 with a fastening member (e.g., a rivet).

[D] The bottom frame 3 of the overhead door section will be described. As shown in Fig. 12 and Fig. 24, the bottom frame 3 of the intermediate section 1 has a horizontal upper surface 30, an exterior side surface 31 which is the exterior facing surface, a vertical indoor side surface 32 which is the interior facing surface, and a lower surface 33, and the lower surface 33 of the bottom frame 3 is the lower surface of the section 1. A hollow portion surrounded by the upper surface 30, the exterior side surface 31, the interior side surface 32, and the lower surface 33 extends over the entire width of the long bottom frame 3. The lower surface 33 is formed in a stepped shape by a horizontal surface 330 on the exterior side, a horizontal surface 331 on the interior side which extends horizontally at a height higher than the horizontal surface 330, and an intermediate vertical surface 332 which connects the exterior horizontal surface 330 and the interior horizontal surface 331. The exterior side portion 31 consists of an upper vertical surface 310 and a concave surface 311 that is integrally formed below the vertical surface 310 and has a V-shaped cross section.

The tip of the outdoor horizontal surface 330 of the lower surface 33 protrudes slightly outside the room beyond the vertical surface 310 of the outdoor side surface portion 31, and a vertically rising piece 34 is formed at the tip of the outdoor horizontal surface 330 of the lower surface 33. The first surface on the outdoor side of the lower vertical surface portion 102 of the main body 10 abuts against the inner surface of the rising piece 34, and the second surface on the indoor side of the lower vertical surface portion 102 abuts against the outer surface of the vertical surface 310, and is fixed to the lower frame 3 with a fastening member (e.g., a rivet).

The indoor side portion 32 of the lower frame 3 extends upward, and a vertical piece 35 that rises vertically from the indoor end of the upper surface 30 is integrally formed, and a horizontal piece 36 that extends to the outdoor side is integrally formed at the upper end of the vertical piece 35. The vertical piece 35 and the horizontal piece 36 form an L-shaped rising piece when viewed from the side. The vertical piece 35 and the indoor side portion 32 form a flush vertical surface. The horizontal piece 36 protrudes to the outdoor side and does not protrude from the vertical plane that passes through the indoor side portion 32. As described below, the lower portion of the middle frame 5 is fixed to the vertical piece 35 of the rising piece with a fastening member (e.g., a rivet).

[E] Reinforcement section protruding from bottom frame of overhead door section The reinforcement section 6 formed integrally with the bottom frame 3 will now be described. A hollow reinforcement section 6 extending across the width of the bottom frame 3 is protruding from the interior side section 32 of the bottom frame 3. In this embodiment, the base end of the reinforcement section 6 protrudes from approximately the center in the height direction of the interior side section 32 of the bottom frame 3. The reinforcement section 6 has a section whose height dimension gradually increases in the direction away from the interior section 32.

As shown in FIG. 18, the upper surface of the reinforcing part 6, in a side view, is composed of an upper horizontal surface 60 extending horizontally from the interior side surface part 32, an upper inclined surface 61 extending diagonally upward from the tip of the upper horizontal surface 60 in a direction away from the interior side surface part 32, and a tip upper surface 62 extending horizontally from the tip of the upper inclined surface 61. The lower surface of the reinforcing part 6, in a side view, is composed of a lower horizontal surface 63 extending horizontally from the interior side surface part 32, a lower inclined surface 64 extending diagonally downward from the tip of the lower horizontal surface 63 in a direction away from the interior side surface part 32, and a tip lower surface 65 extending horizontally from the tip of the lower inclined surface 64. The tip of the tip upper surface 62 and the tip of the tip lower surface 65 are connected by a tip vertical surface 66. The plate thickness of the tip vertical surface 66 is thicker than the plate thickness of other parts.

The tip of the upper inclined surface 61 (the base end of the tip upper surface 62) and the tip of the lower inclined surface 64 (the base end of the tip lower surface 65) are connected by a vertical edge 67. The base end of the upper inclined surface 61 (the tip of the upper horizontal surface 60) and the base end of the lower inclined surface 64 (the tip of the lower horizontal surface 63) are connected by a vertical edge 68. The intermediate portions of the upper horizontal surface 60 and the lower horizontal surface 63 are connected by two vertical edges 69a, 69b.

The reinforcing portion 6 comprises a first portion 6A at the base end side, which has a constant height dimension, and a second portion 6B, which is located at the tip end side of the first portion 6A, has an upper inclined surface 61 and a lower inclined surface 64, and whose height dimension gradually increases in the direction away from the first portion 6A (towards the interior of the room).

The first portion 6A is composed of an upper horizontal surface 60 extending horizontally from the indoor side portion 32 toward the inside of the room, a lower horizontal surface 63 extending horizontally from the indoor side portion 32 toward the inside of the room, and a number of hollow portions 603, 604, 605 formed between the upper horizontal surface 60 and the lower horizontal surface 63 by being partitioned by parts of the indoor side portion 32, vertical edges 69a, 69b, and vertical edge 68.

The second portion 6B is composed of an upper inclined surface 61 extending obliquely upward toward the interior side of the room, a lower inclined surface 64 extending obliquely downward toward the interior side of the room, a tip upper surface 62 extending horizontally from the tip of the upper inclined surface 61 toward the interior side of the room, a tip lower surface 65 extending horizontally from the tip of the lower inclined surface 64 toward the interior side of the room, a vertical edge 67 connecting the tip of the upper inclined surface 61 and the tip of the lower inclined surface 64, a tip vertical surface 66 connecting the tip of the tip upper surface 62 and the tip lower surface 65, a first hollow portion 606 formed by the upper inclined surface 61, the lower inclined surface 64, the vertical edge 67, and the vertical edge 68 and having a generally triangular or trapezoidal shape in a side view, and a second hollow portion 607 formed by the tip upper surface 62, the tip lower surface 65, the vertical edge 67, and the tip vertical surface 66 and having a vertical rectangular shape in a side view.

As shown in FIG. 19, in this embodiment, the height dimension of the tip portion of the reinforcing portion 6, i.e., the height dimension of the tip vertical surface 66, is greater than the height dimension of the bottom frame 3. The height position of the upper end of the tip portion of the reinforcing portion 6, i.e., the height position of the tip upper surface 62, is located above the upper surface portion 30 of the bottom frame 3. The height position of the lower end of the tip portion of the reinforcing portion 6, i.e., the height position of the tip lower surface 65, is located below the lower surface portion 33 (the horizontal surface 331 on the indoor side) of the bottom frame 3. The upper end of the rising piece (vertical piece 35 + horizontal piece 36) protruding upward from the upper end of the indoor side portion 32 of the bottom frame 3 is located above the tip upper surface 62, and in the illustrated embodiment, the height position of the approximately central portion of the height dimension of the rising piece (vertical piece 35 + horizontal piece 36) and the tip upper surface 62 are the same.

As shown in Figures 14, 19, 23, etc., both ends of the reinforcing portion 6 in this embodiment do not reach both ends of the lower frame 3. In other words, the interior side portion 32 of the lower frame 3 has both side portions 320 that do not have the reinforcing portion 6. The reinforcing portion 6 in this embodiment is formed by cutting out both end portions from a state in which it is integrally molded to have approximately the same width as the interior side portion 32 of the lower frame 3, and the side edges 600 at both ends of the reinforcing portion 6 in the width direction and the portions 320' of the both side portions 320 that extend horizontally from the base ends of the side edges 600 are cutout portions. The cutout portions 320' are cut out so as to be flush with the interior side portion 32.

The side edge 600 of the reinforcing part 6 is composed of a first part 601 that extends linearly in a plan view, and a second part 602 that is located on the base end side of the first part 601 and has a curved shape in a plan view. That is, in the cutout portion, the corners between the base end side portion of the side edge 600 of the reinforcing part 6 and the parts 320' of both side portions 320 of the interior side part 32 are curved in a plan view. In this embodiment, covers C are attached to both end portions of the reinforcing part 6 in the width direction so as to cover the first parts 601 of the side edge 600 of the reinforcing part 6.

In this embodiment, the first portion 601 of the side edge 600 consists of the tip portion of the side edge of the upper horizontal surface 60, the side edge of the upper inclined surface 61, the side edge of the tip upper side surface 62, the tip portion of the side edge of the lower horizontal surface 63, the side edge of the lower inclined surface 64, the side edge of the tip lower side surface 65, the side edge of the tip vertical surface 66, the side edge of the vertical side 67, the side edge of the vertical side 68, and the side edges of the vertical sides 69a and 69b. The second portion 602 of the side edge 600 consists of the base portion of the side edge of the upper horizontal surface 60 and the base portion of the side edge of the lower horizontal surface 63.

[F] Vertical frame of overhead door section The vertical frame 4 of section 1 will be described. As shown in Fig. 11, Fig. 15, Fig. 34, Fig. 48, etc., the vertical frame 4 is a long member extending vertically in the height direction, and has a U-shaped cross section consisting of a projection surface portion 40, an exterior projection portion 41, and an interior projection portion 42. The projection surface portion 40 of the vertical frame 4 forms both end faces in the width direction of the section 1. The upper end portion of the exterior projection portion 41 is fixed to the exterior side surface portion 21 (vertical surface 210) of the upper frame 2, and the lower end portion is fixed to the exterior side surface portion 31 (vertical surface 310) of the lower frame 3. The upper end portion of the interior projection portion 42 is fixed to the interior side surface portion 22 of the upper frame 2, and the lower end portion is fixed to the interior side surface portion 32 of the lower frame 3. In vertically adjacent sections 1 , the lower portion of the interior facing portion 42 of the vertical frame 4 of the upper section 1 and the upper portion of the interior facing portion 42 of the vertical frame 4 of the lower section 1 are connected by a hinge 16 .

The inner vertical frame 4' of section 1 will now be described. As shown in Figures 11, 15, 34, etc., the inner vertical frame 4' is a long member that extends vertically in the height direction and has a hat-shaped cross section made up of a surface portion 40' which is the interior facing surface, a first side surface portion 41' which is the facing surface, a second side surface portion 42', a first facing edge 43', and a second facing edge 44'. The first side portion 41', the second side portion 42', the first visible edge 43', and the second visible edge 44' are shorter than the overall height of the inner vertical frame 4', the upper ends of the first side portion 41', the second side portion 42', the first visible edge 43', and the second visible edge 44' are located lower than the upper end of the surface portion 40', and the lower ends of the first side portion 41', the second side portion 42', the first visible edge 43', and the second visible edge 44' are located higher than the lower end of the surface portion 40', and the surface portion 40' has an upper portion located higher than the upper ends of the first side portion 41', the second side portion 42', the first visible edge 43', and the second visible edge 44', and a lower portion located lower than the lower end of the first side portion 41', the second side portion 42', the first visible edge 43', and the second visible edge 44'.

The upper portion of the surface portion 40' of the inner vertical frame 4' is fixed to the interior side portion 22 of the upper frame 2, and the lower portion of the surface portion 40' is fixed to the interior side portion 32 of the lower frame 3. The upper ends of the first side portion 41', second side portion 42', first visible edge 43', and second visible edge 44' are close to or abut the lower surface portion 23 of the upper frame 2, and the lower ends of the first side portion 41', second side portion 42', first visible edge 43', and second visible edge 44' are close to or abut the horizontal piece 36 at the upper end of the vertical piece 35 that rises vertically from the upper surface portion 30 of the lower frame 3. In vertically adjacent sections 1, the lower portion of the surface portion 40' of the inner vertical frame 4' of the upper section 1 and the upper portion of the surface portion 40' of the inner vertical frame 4' of the lower section 1 are connected by a hinge 16.

The vertically adjacent sections 1 are rotatably connected by hinges 16 provided on the vertical frame 4, the interior facing portion 42 of the inner vertical frame 4', and the interior surface portion 40' of the section 1, which are arranged side by side at both ends of the section 1 in the width direction. The hinges 16 consist of an upper first plate 160, a lower second plate 161, and an axis portion 162. The first plate 160 of the hinge 16 is fixed to the vertical frame 4, the interior facing portion 42 of the inner vertical frame 4', and the lower end portion of the interior surface portion 40' of the section 1 located on the upper side. The first plate 160 consists of a surface portion 163 and rising pieces 164 on both the left and right ends of the surface portion 163. The second plate 161 of the hinge 16 is fixed to the vertical frame 4, the interior facing portion 42 of the inner vertical frame 4', and the upper end portion of the interior surface portion 40' of the section 1 located on the lower side. The second plate 161 is made up of a surface portion 165 and rising pieces 166 on both the left and right ends of the surface portion 165. The lower portion of the rising piece 164 of the first plate 160 overlaps with the upper portion of the rising piece 166 of the second plate 161, and the shaft portion 162 of the hinge 16 is provided at this overlapping portion.

In this embodiment, the rise dimension of the left and right rising pieces 166 of the second plate 161 of the hinge 16 is larger than the left and right rising dimension 164 of the first plate 160, and the rising pieces 166 form a roller bracket that supports the roller shaft 110 of the guide roller 11. In other words, the roller shaft 110 of the guide roller 11 is supported by four rising pieces 166 arranged side by side in the width direction at the width direction end of the indoor side part of each section 1. The mounting structure of the roller bracket according to this embodiment will be described later.

[G] Middle Frame of Overhead Door Section The middle frame 5 of section 1 will now be described. The middle frame 5 is fixed to span between the upper frame 2 and the lower frame 3 in section 1, and multiple middle frames 5 are provided at intervals in the width direction of section 1. The middle frames 5 serve to reinforce section 1 and to serve as mounting points for hinges 16'. Please note that, as will be described later, some of the multiple middle frames 5 may include middle frames (5B) to which hinges 16' are not attached.

11, 17, 22, 34, etc., the center frame 5 is a long member extending vertically in the height direction, and has a hat-shaped cross section with a surface portion 50, which is the interior facing surface, a first side portion 51, a second side portion 52, a first facing edge 53, and a second facing edge 54, and has a cross-sectional shape that is approximately the same as that of the inner vertical frame 4'. In addition, the first side portion 51 and the second side portion 52 extend from both ends of the width direction of the surface portion 50, and protrusions 512, 522 that extend the entire height of the center frame 5 are formed at both ends of the width direction of the surface portion 50. While the vertical frame 4 and the inner vertical frame 4' have a height dimension that covers the entire height of the section 1, the height dimension of the center frame 5 is slightly shorter than the height dimensions of the vertical frame 4 and the inner vertical frame 4'. As shown in Figures 11 and 22, the upper end of the middle frame 5 is located at the upper end of section 1 (upper surface portion 20 of upper frame 2), while the lower end of the middle frame 5 is located above the reinforcing portion 6 of the lower frame 3 of section 1 and does not reach the lower end of section 1.

The first side portion 51, the second side portion 52, the first visible edge 53, and the second visible edge 54 of the center frame 5 are shorter than the overall height of the center frame 5, and the upper end 510 of the first side portion 51 (see FIG. 22), the upper end of the second side portion 52 (not shown, at the same height as the upper end 510), the upper end 530 of the first visible edge 53, and the upper end 540 of the second visible edge 54 are located below the upper end of the surface portion 50, and the lower end 511 of the first side portion 51 (see FIG. 22), the lower end of the second side portion 52 (not shown, at the same height as the lower end 511), the lower end 531 of the first visible edge 53, and the lower end 541 of the second visible edge 54 are located above the lower end of the surface portion 50.

The surface portion 50 has an upper portion 500 located above the upper end 510 of the first side portion 51 (see FIG. 22), the upper end of the second side portion 52, the upper end 530 of the first visible edge 53, and the upper end 540 of the second visible edge 54, and a lower portion 501 located below the lower end 511 of the first side portion 51, the lower end of the second side portion 52 (not shown, at the same height as the lower end 511), the lower end 531 of the first visible edge 53, and the lower end 541 of the second visible edge 54. As shown in FIG. 17, a hole portion 502 is formed in the upper portion of the surface portion 50 for attaching the second plate 161' of the hinge 16' with a fastening member (e.g., a screw and a pop nut), and a hole 503 is formed in the lower portion of the surface portion 50 for fixing the lower end portion of the middle frame 5 to the vertical piece 35 of the rising piece of the lower frame 3 with a fastening member (e.g., a blind rivet). In this specification, "screw" includes "bolt."

As shown in FIG. 22, the upper portion 500 of the face portion 50 of the middle frame 5 abuts against the indoor side portion 22 of the upper frame 2, and the upper portion 500 is fixed to the indoor side portion 22 of the upper frame 2 with a fastening member (e.g., a screw and a pop nut), and the lower portion 501 of the face portion 50 abuts against the vertical piece 35 of the rising piece of the lower frame 3 and the upper half portion of the indoor side portion 32, and the lower portion 501 is fixed to the vertical piece 35 of the rising piece of the lower frame 3 with a fastening member (e.g., a blind rivet). In this embodiment, protrusions (so-called flanges) 512, 522 are integrally formed at the widthwise ends of the upper portion 500 and the lower portion 501 of the face portion 50 of the middle frame 5, so that the strength of the upper portion 500 and the lower portion 501 formed only from the face portion is improved.

The vertically adjacent sections 1 are rotatably connected by hinges 16' provided on the interior surface 50 of the multiple middle frames 5 provided at the widthwise intermediate portion of the sections 1 and the lower horizontal surface 63 of the base end side of the reinforcement portion 6 protruding from the bottom frame 3 of the sections 1. The hinges 16' are composed of an upper first plate 160', a lower second plate 161', and a shaft portion 162'. As shown in FIG. 38, the first plate 160' of the hinge 16' is fixed to the lower horizontal surface 63 of the base end side of the reinforcement portion 6 protruding from the interior side portion 32 of the bottom frame 3 of the section 1 located on the upper side, and the second plate 161' of the hinge 16' is fixed to the upper end portion of the interior surface 50 of the middle frame 5 of the section 1 located on the lower side.

[H] Arrangement of center frames of overhead door sections In the embodiment shown in Fig. 4, four center frames 5 are provided at approximately equal intervals in the width direction of each section 1. In contrast, in the embodiment shown in Fig. 1, Fig. 8, and Fig. 9, in an overhead door door body D formed by connecting a plurality of sections 1 in the height direction, each section 1 comprises a main body 10, left and right vertical frames 4, an upper frame 2, a lower frame 3, and a plurality of center frames 5 provided to bridge the upper frames 2 and the lower frames 3, and the center frames 5 are arranged more densely in the center of each section 1 in the width direction than at both ends in the width direction.

More specifically, the multiple middle frames 5 are arranged at equal intervals in the width direction of the section 1 and consist of multiple first middle frames 5A equipped with hinges 16 for connecting adjacent sections 1 vertically, and multiple second middle frames 5B arranged between the multiple first middle frames 5A located in the center of the width direction and not equipped with hinges.

In the embodiment shown in FIG. 1, seven first middle frames 5A and two second middle frames 5B are arranged in each section 1 constituting the door body D, and in the embodiment shown in FIG. 8, five first middle frames 5A and two second middle frames 5B are arranged in each section 1 constituting the door body D. In the embodiment shown in FIG. 9, four first middle frames 5A and three second middle frames 5B are arranged.

When the number of first stiles 5A is an odd number, one first stile 5A is placed in the center of the width of section 1, with second stiles 5B placed on either side of it. When the number of first stiles 5A is an even number, one second stile 5B is placed in the center of the width of section 1, with two central first stiles 5A placed on either side of it, with second stiles 5B placed adjacent to each central first stile 5A with a gap between them.

[I] Reinforcement material incorporated in the bottom frame of the overhead door section With reference to Figures 23 to 25, the reinforcement material 8 incorporated in the bottom frame 3 of section 1 will be described. As described above, the interior side portion 32 of the bottom frame 3 according to this embodiment has both side portions 320 that do not have reinforcing portions. A long reinforcement material 8 is incorporated in the bottom frame 3 so as to follow at least the inner surface of both side portions 320. The reinforcement material 8 according to this embodiment has a cross-sectional shape that follows the inner surface shape of the bottom frame 3, and is inserted into the hollow portion from the opening at the width direction end of the bottom frame 3 and incorporated. In this embodiment, the left and right reinforcement materials 8 are incorporated in the hollow portion of the bottom frame 3 at the left and right ends in the width direction of the bottom frame 3 so as to follow the inner surfaces of the left and right side portions 320.

As shown in FIG. 25, the reinforcing member 8 according to this embodiment is a long member having a predetermined length, and is composed of an upper surface portion 80, an indoor side surface portion 81, a lower surface portion 82, an upper hanging piece 83 on the outdoor side of the upper surface portion 80, a lower hanging piece 84 on the outdoor side of the lower surface portion 82, and a lower horizontal piece 85 extending horizontally from the lower end of the lower hanging piece 84 to the outdoor side, and is provided with a first end 86 and a second end 87. An opening is formed between the upper hanging piece 83 and the lower horizontal piece 85, and the portion of the reinforcing member 8 corresponding to the indoor side surface portion 81 (the portion facing the indoor side) is open. The reinforcing member 8 according to this embodiment is made of steel, and is obtained by bending and forming a steel plate.

The upper surface 80 of the reinforcing material 8 has multiple rivet holes 800 spaced apart in the length direction. The interior side surface 81 of the reinforcing material 8 has three pop nut holes 810 near the first end 86, and a bolt insertion hole 811 is formed on the side of the hole 810 furthest from the first end 86 away from the first end 86. A nut 88 is fixed by welding to the rear surface of the interior side surface 81, located behind the insertion hole 811.

As shown in FIG. 24, when the reinforcing material 8 is incorporated into the hollow portion of the bottom frame 3, the upper surface portion 80 of the reinforcing material 8 abuts against the inner surface of the upper surface portion 30 of the bottom frame 3 and is fixed with a fastening member (e.g., a blind rivet), the interior side surface portion 81 of the reinforcing material 8 abuts against the inner surface of the interior side surface portion 32 of the bottom frame 3 and is fixed with a fastening member (e.g., a screw), and the lower surface portion 82 of the reinforcing material 8 abuts against the inner surface of the lower surface portion 32 of the bottom frame 3 and is fixed with a fastening member (e.g., a screw). 3, the upper hanging piece 83 of the reinforcing material 8 is close to (may abut) the vertical surface 310 of the exterior side surface 31 of the bottom frame 3, the lower hanging piece 84 of the reinforcing material 8 is close to (may abut) the vertical surface 332 of the bottom surface 33 of the bottom frame 3, and the lower horizontal piece 85 of the reinforcing material 8 is close to (may abut) the horizontal surface 330 of the bottom surface 33 of the bottom frame 3.

The first end 86 of the reinforcement 8 coincides with or is close to the widthwise edge of the lower frame 3, and the second end 87 of the reinforcement 8 is located at least closer to the widthwise center of the lower frame 3 than the widthwise side edge 600 of the reinforcing portion 6. For example, as a non-limiting example, the length dimension of the reinforcement 8 is 1.5 times or more, for example, about twice the width dimension of each side portion 320. In the present invention, it is not excluded to incorporate a reinforcement material across the entire width of the lower frame 3 into the hollow portion of the lower frame 3, but from the perspective of reducing the weight of the section 1, it is advantageous to incorporate reinforcement materials 8 that are shorter than the entire width into both left and right end portions of the lower frame 3.

In this embodiment, a hollow type bottom frame 3 is shown, but the bottom frame 3 may also be a solid type. A solid type bottom frame 3' is shown in Figure 26. As shown in Figure 26, a reinforcing portion 6 is protruded from the interior side portion 32' of the bottom frame 3', and both widthwise ends of the reinforcing portion 6 do not reach both ends of the bottom frame 3'. Reinforcing material 8' is provided at both widthwise ends of the inner surface of the bottom frame 3' so as to run along the inner surface (the inner surface of the upper surface portion 30', the interior side portion 32' and the lower surface portion 33').

[J] Attachment to be attached to the tip of the reinforcement part protruding from the bottom frame of the overhead door section. As shown in Figures 20, 21, 22, 36 and 38, an attachment 7 can be attached to the tip portion of the reinforcement part 6 of the bottom frame 3 of section 1 in this embodiment, and by attaching the attachment 7 to the tip portion of the reinforcement part 6, the tip side of the reinforcement part 6 can be extended away from the interior side portion 32.

As shown in Figures 20 and 21, the attachment 7 according to this embodiment is an elongated member having a generally U-shaped cross section consisting of a front portion 70, an upper portion 71, and a lower portion 72. The upper portion 71 is made up of an extension portion 710 on the side closer to the front portion 70 and a fixed portion 711 on the side farther from the front portion 70, and the lower portion 72 is made up of an extension portion 720 on the side closer to the front portion 70 and a fixed portion 721 on the side farther from the front portion 70. A positioning piece 73 that abuts on the tip portion of the reinforcing portion 6 is protruded from the lower surface of the upper portion 71 of the attachment 7 at the boundary between the extension portion 710 and the fixed portion 711, and a positioning piece 74 that abuts on the tip portion of the reinforcing portion 6 is protruded from the upper surface of the lower portion 72 at the boundary between the extension portion 720 and the fixed portion 721.

The attachment 7 can be fixed, for example, by a fastening member (e.g., a rivet) with the fixing portion 711 of the upper surface portion 71 abutting against the upper surface of the tip portion of the reinforcement portion 6 (horizontal tip upper surface 62) and the fixing portion 721 of the lower surface portion 72 abutting against the lower surface of the tip portion of the reinforcement portion 6 (horizontal tip lower surface 65).

When the attachment 7 is attached to the tip of the reinforcing part 6, the extension 710 of the upper part 71, the extension 720 of the lower part 72, and the front part 70 are located inside the room relative to the tip vertical surface 66 of the reinforcing part 6, and by attaching the attachment 7 to the tip of the reinforcing part 6, the tip side of the reinforcing part 6 is extended away from the indoor side part 32. For example, by preparing multiple types of attachments 7 consisting of extensions 710, 720 with different dimensions, different attachments 7 can be selected to meet the strength required at the site.

When the attachment 7 is attached to the reinforcing portion 6, the plate thickness of the front portion 70, which is located at the position furthest from the indoor side portion 32, is greater than the plate thicknesses of the upper portion 71 and the lower portion 72. In addition, in the upper portion 71, the plate thickness of the extension portion 710 is greater than the plate thickness of the fixing portion 711, and in the lower portion 72, the plate thickness of the extension portion 720 is greater than the plate thickness of the fixing portion 721.

The upper surface 71 and the lower surface 72 of the attachment 7 according to this embodiment are provided with positioning pieces 73 and 74, so that the opening of the attachment 7, which is U-shaped in cross section, can receive the tip portion of the reinforcement portion 6. The upper surface 71 and the lower surface 72 sandwich the upper and lower surfaces of the tip portion of the reinforcement portion 6, and the attachment 7 is placed over the opening. The upper positioning piece 73 abuts against the upper portion of the tip portion of the reinforcement portion 6 (corner formed by the tip upper surface 62 and the tip vertical surface 66), and the lower positioning piece 74 abuts against the lower portion of the tip portion of the reinforcement portion 6 (corner formed by the tip lower surface 65 and the tip vertical surface 66). This allows the attachment 7 to be positioned in a state where the upper positioning piece 73 abuts against the upper portion of the tip portion of the reinforcement portion 6 (corner formed by the tip lower surface 65 and the tip vertical surface 66). This makes it easy to attach the long attachment 7 to the reinforcement portion 6 extending in the width direction of the lower frame 3 of the section 1.

The attachment 7 according to this embodiment shows one embodiment, and the specific shape and configuration of the attachment 7 are not limited to the embodiment shown in the figure. For example, the legs of the attachment, which are hat-shaped in cross section, may be fixed to the vertical surface (tip vertical surface 66) of the tip portion of the reinforcing portion 6 with a fastening member (e.g., a screw), so that the tip side of the reinforcing portion 6 extends away from the interior side portion 32.

[K] Top Section of Overhead Door The details of the configuration of section 1 have been described mainly based on the middle section 1, but the basic configurations of the top section 1' and bottom section 1'' are the same as those of the middle section 1, and the description of the middle section 1 can be used.

Figures 27 and 28 show a front view and a vertical cross-sectional view of the top section 1', but the configurations of the main body 10, upper frame 2 (excluding reinforcing portion 6'), lower frame 3, vertical frame 4, inner vertical frame 4', center frame 5 (excluding the configuration of the upper end portion), and reinforcing portion 6 of the top section 1' are substantially the same as the configurations of the main body 10, upper frame 2, lower frame 3, vertical frame 4, inner vertical frame 4', and reinforcing portion 6 of the middle section 1, and the description of the main body 10, upper frame 2, lower frame 3, vertical frame 4, inner vertical frame 4', and reinforcing portion 6 of the middle section 1 can be used. The configuration unique to the top section 1' is described below.

[L] Reinforcement part protruding from the upper frame of the top section of the overhead door As shown in the lower diagram of Fig. 27 and Fig. 28, a hollow reinforcement part 6' extending across the width of the upper frame 2 is protruding from the upper end of the interior side part 22 of the upper frame 2 of the top section 1'. As shown in Fig. 29, the reinforcement part 6' has an upper horizontal surface 60' extending horizontally from the upper end of the interior side part 22 toward the interior side of the room, and a lower horizontal surface 61' located below the upper horizontal surface 60' and extending horizontally from the interior side part 22 toward the interior side of the room, and the tip side of the upper horizontal surface 60' is an extension part that extends beyond the tip of the lower horizontal surface 61'. A tip vertical surface 62' is formed hanging down from the tip of the extension portion of the upper horizontal surface 60', and a vertical surface 63' is formed parallel to the tip vertical surface 62' and passing through the tip of the lower horizontal surface 61', with the upper end of the vertical surface 63' connected to the upper horizontal surface 60', and the lower ends of the tip vertical surface 62' and the vertical surface 63' being connected by a lower end surface 64'.

The reinforcing portion 6' has an L-shaped cross section, consisting of a horizontal portion 6A' that extends horizontally from the indoor side portion 22 of the upper frame 2 toward the inside of the room, and a hanging portion 6B' that hangs down from the end of the horizontal portion 6A'. The horizontal portion 6A' of the reinforcing portion 6' is formed from an upper horizontal surface 60' (excluding the extension) and a lower horizontal surface 61', and the hanging portion 6B' is formed from the extension of the upper horizontal surface 60', a tip vertical surface 62', a vertical surface 63', and a lower end surface 64'. The thickness of the hanging portion 6B' is thicker than the thickness of the horizontal portion 6A'.

As shown in the lower diagram of Figure 27, Figures 30 and 32, both ends of the reinforcing portion 6' in this embodiment in the width direction do not reach both end portions of the upper frame 2. In other words, the interior side portion 22 of the upper frame 2 has both side portions 220 that do not have the reinforcing portion 6'. The reinforcing portion 6' in this embodiment is formed by cutting out both end portions from a state in which it is integrally molded to have approximately the same width as the interior side portion 22 of the upper frame 2, and the side edges 600' at both ends of the reinforcing portion 6' in the width direction and the portions of the both side portions 220 that extend horizontally from the base ends of the side edges 600' are cut out portions. The cut out portions are cut out so as to be flush with the interior side portion 22.

The side edge 600' of the reinforcement portion 6' is composed of a first portion 601' extending linearly in a plan view, and a second portion 602' located at the base end side of the first portion 601' and curved in a plan view. That is, in the cutout portion, the corners between the base end side portion of the side edge 600' of the reinforcement portion 6' and the portions of both side portions 220 of the indoor side portion 22 are curved in a plan view. In this embodiment, the first portion 601' of the side edge 600' is composed of the tip side portion of the hanging portion 6B' and the horizontal portion 6A', and the second portion 602' of the side edge 600' is composed of the base end side portion of the horizontal portion 6A'. In this embodiment, a cover C' is attached to both ends of the width direction of the reinforcement portion 6' so as to cover the portion including the first portion 601' of the side edge 600' of the reinforcement portion 6'.

A guide roller 11 is provided at the upper end of the indoor side portion of the top section 1'. A roller bracket 17 supporting the roller shaft 110 of the guide roller 11 is fixed to the vertical frame 4 of the top section 1', the indoor side facing portion 42 of the inner vertical frame 4', and the upper end of the indoor side surface portion 40'. Please note that in the embodiment shown in FIG. 5, the support portion 171 supporting the roller shaft 110 is located below the surface portion 170 serving as the fixed portion of the roller bracket 17, and in the embodiment shown in FIG. 39, the support portion 171 supporting the roller shaft 110 is located above the surface portion 170 of the roller bracket 17. The mounting structure of the roller bracket 17 according to this embodiment will be described later.

The upper end of the center frame 5 of the top section 1' does not reach the top surface of the top section 1', but abuts or is close to the base end of the lower horizontal surface 61' of the reinforcement part 6'. The connection configuration between the lower part of the center frame 5 of the top section 1' and the lower frame 3 can be explained using the explanation of the connection configuration between the lower part of the center frame 5 of the intermediate section 1 and the lower frame 3. In addition, an attachment for extending the tip side of the reinforcement part 6' may be attached to the reinforcement part 6'. In this case, it will be understood by those skilled in the art that the attachment of the reinforcement part 6' has a different shape and dimensions from the attachment 7 attached to the reinforcement part 6 of the lower frame 3.

[M] Reinforcement material incorporated in the upper frame of the top section of the overhead door As shown in FIG. 29, a reinforcement material 9 is incorporated in the hollow portion of the upper frame 2 of the top section 1'. As described above, the interior side portion 22 of the upper frame 2 according to this embodiment has both side portions 220 that do not have reinforcing portions. A long reinforcement material 9 is incorporated in the upper frame 2 so as to follow at least the inner surface of both side portions 220. The reinforcement material 9 according to this embodiment has a cross-sectional shape that follows the inner surface shape of the upper frame 2, and is inserted into the hollow portion from the opening at the width direction end of the upper frame 2. In this embodiment, left and right reinforcement materials 9 are incorporated in the hollow portion of the upper frame 2 at the left and right ends in the width direction of the upper frame 2 so as to follow the inner surfaces of the left and right side portions 220.

29, 31, and 33, the reinforcing member 9 according to this embodiment is a long member having a predetermined length, and is made up of a lower surface portion 90, an indoor side surface portion 91 rising from the indoor side end of the lower surface portion 90, an upper surface portion 92 extending horizontally from the upper end of the indoor side surface portion 91 to the outdoor side, a lower vertical piece 93 rising from the outdoor side end of the lower surface portion 90, and an upper hanging piece 94 hanging down from the outdoor side end of the upper surface portion 92, and is provided with a first end 95 and a second end 96. An opening extending in the length direction is formed between the lower vertical piece 93 and the upper hanging piece 94, and the portion of the reinforcing member 9 corresponding to the indoor side surface portion 91 (the portion facing the indoor side) is open. The reinforcing member 9 according to this embodiment is made of steel, and is obtained by bending and forming a steel plate. In this embodiment, two types of reinforcing material 9 with different length dimensions are used, and the reinforcing material 9 with the longer length dimension is identified as reinforcing material 9A (Figures 30 and 31), and the reinforcing material 9 with the shorter length dimension is identified as reinforcing material 9B (Figures 32 and 33).

As shown in FIG. 31, the underside 90 of the reinforcing member 9A has a plurality of rivet holes 900 spaced apart in the length direction. The interior side 91 of the reinforcing member 9A has a first hole set for fixing the first bracket, which consists of three holes located at the vertices of an imaginary triangle, near the first end 95. The first hole set corresponds to the three bolts S above the vertices of the imaginary diamond on the interior facing portion 42 of the vertical frame 4 shown in FIG. 5, and the three holes above the vertices of the imaginary diamond on the interior facing portion 42 of the vertical frame 4 shown in FIG. 39. The first hole set consists of a pop nut notch 910, a pop nut hole 911, and an insertion hole 912 for the bolt S, and a nut 97 is fixed by welding to the rear surface of the interior side 91 at the rear surface of the insertion hole 912. A second hole set for fixing the second bracket is formed adjacent to the first hole set on the side away from the first end 95, and consists of three holes located at the vertices of an imaginary triangle. The second hole set corresponds to the three bolts S above the vertices of the imaginary diamond on the surface 40' of the inner vertical frame 4' shown in FIG. 5, and the three holes above the vertices of the imaginary diamond on the surface 40' of the inner vertical frame 4' shown in FIG. 39. The second hole set consists of a pop nut hole 911 and insertion holes 912 for two bolts S, and a nut 97 is fixed by welding to the back side of the interior side surface portion 91, located behind the insertion hole 912.

33, the underside 90 of the reinforcing member 9B has a plurality of rivet holes 900 spaced apart in the length direction. The interior side 91 of the reinforcing member 9B has a first hole set for fixing the first bracket, which consists of three holes located at the vertices of a virtual triangle, near the first end 95. The first hole set corresponds to the three bolts S above the vertices of the virtual diamond on the interior facing part 42 of the vertical frame 4 shown in FIG. 5, and the three holes above the vertices of the virtual diamond on the interior facing part 42 of the vertical frame 4 shown in FIG. 39. The first hole set consists of a notch 910 for a pop nut and two holes 911 for a pop nut. A second hole set for fixing the second bracket, which consists of three holes located at the vertices of a virtual triangle, is formed adjacent to the first hole set on the side away from the first end 95. The second hole set corresponds to the three bolts S above the vertices of the imaginary diamond on the surface 40' of the inner vertical stile 4' shown in FIG. 5, and the three holes above the vertices of the imaginary diamond on the surface 40' of the inner vertical stile 4' shown in FIG. 39. The second hole set consists of three pop nut holes 911.

As shown in FIG. 29, when the reinforcing material 9 is incorporated into the hollow portion of the upper frame 2, the lower surface portion 90 of the reinforcing material 9 abuts against the inner surface of the lower surface portion 23 of the upper frame 2 and is fixed with a fastening member (e.g., a blind rivet R), the indoor side surface portion 91 of the reinforcing material 9 abuts against the inner surface of the indoor side surface portion 22 of the upper frame 2 and is fixed with a fastening member (e.g., a bolt S), the upper surface portion 92 of the reinforcing material 9 is close to (may abut) the horizontal surface 201 of the upper surface portion 20 of the upper frame 2, the lower vertical piece 93 of the reinforcing material 9 is close to (may abut) the vertical surface 210 of the outdoor side surface portion 21 of the upper frame 2, and the upper hanging piece 94 of the reinforcing material 9 is close to (may abut) the vertical surface 202 of the upper surface portion 20 of the upper frame 2.

One end 95 of the reinforcing material 9 is aligned with or close to the widthwise edge of the upper frame 2, and the other end 96 of the reinforcing material 9 is located at least closer to the widthwise center of the upper frame 2 than the widthwise side edge 600' of the reinforcing portion 6. In the embodiment shown in FIG. 30, the length dimension of the reinforcing material 9A is approximately twice the width dimension of each side portion 220. In the embodiment shown in FIG. 32, the other end 96 of the reinforcing material 9B is located at a position extending slightly from each side portion 220 toward the widthwise center. In the present invention, it is not excluded to incorporate a reinforcing material over the entire width of the upper frame 2 into the hollow portion of the upper frame 2, but from the viewpoint of reducing the weight of the section 1, it is advantageous to incorporate reinforcing materials 9 that are shorter than the entire width at both left and right end portions of the upper frame 2.

[N] Mounting structure of roller bracket of overhead door section The roller bracket 17 supporting the roller shaft 110 of the guide roller 11 is fixed by a fastening member (e.g., a screw) to the upper part of both widthwise ends on the interior side surface of the section 1. As shown in Figures 42 and 43, the roller bracket 17 has a surface portion 170 as a fixing portion fixed to the interior side surface of the section 1, and a support portion 171 for the roller shaft 110 positioned in a protruding manner relative to the surface portion 170. In the embodiment shown in Figures 42 and 43, two roller brackets 17 are provided adjacent to each other in the widthwise direction at the widthwise ends of the interior side surface of the section 1, and the roller shaft 110 is supported by the support portions 171 of the two roller brackets 17.

In the embodiment shown in FIG. 42, each roller bracket is fixed by three bolts S as shown in the example with the surface portion 170 abutting against the indoor side surface of section 1. In the embodiment shown in the upper diagram of FIG. 42, all six bolts S are fastened to pop nuts, thereby fixing the surface portion 170 of the roller bracket 17 to the indoor side surface of section 1.

In the embodiment shown in FIG. 43, each roller bracket is fixed by two bolts S shown in the example with the surface portion 170 abutting against the indoor side surface of section 1. In the embodiment shown in the upper diagram of FIG. 43, all four bolts S are fastened to pop nuts, so that the surface portion 170 of the roller bracket 17 is fixed to the indoor side surface of section 1. When a large wind pressure acts on section 1, a force acts on the roller bracket 17 and the fixing portion of the indoor side surface of section 1 as the guide roller 11 abuts against the inner surface of the guide rail G due to deformation of section 1, so that the roller shaft 110 tilts. In the embodiment shown in the upper diagram of FIG. 42 and the upper diagram of FIG. 43, the strength of the mounting portion of the roller bracket depends on the pull-out strength of the pop nut, which may hinder the improvement of the strength of the section (a conceptual diagram of the bolt S moving in the direction of removal is shown on the right).

In the embodiment shown in the lower diagram of Figure 42 and the lower diagram of Figure 43, the pop nuts located at the locations where a larger rotational moment can act when wind pressure acts are replaced with nuts (88, 97). In one embodiment, a back plate with a nut welded to the back surface is prepared, and this back plate is inserted through the hollow parts of the upper frame 2 and the lower frame 3, and fixed to the back surfaces of the indoor side portion 22 and the indoor side portion 32. In this embodiment, the back plate equipped with the welded nut is the indoor side portion 81, 91 of the reinforcement material 8, 9A. This will be explained in more detail below.

In the embodiment shown in the lower diagram of FIG. 42, the surface portion 170 of the roller bracket 17 is fixed to the indoor side surface of the section 1 by fastening two bolts S' on the far side from the widthwise end of the section 1 to nuts 97 provided on the back surface of the indoor side surface of the section 1 among the three bolts S that fix the surface portion 170 of the roller bracket 17 on the side closer to the widthwise end of the section 1 to the indoor side surface of the section 1. The surface portion 170 of the roller bracket 17 is fixed to the indoor side surface of the section 1 by fastening one bolt S' on the far side from the widthwise end of the section 1 to a nut 97 provided on the back surface of the indoor side surface of the section 1 among the three bolts S that fix the surface portion 170 of the roller bracket 17 on the side closer to the widthwise end of the section 1 to the indoor side surface of the section 1. The nut 97 is provided on the back surface of the indoor side surface of the section 1 by incorporating a back plate (not shown) with a nut 97 welded to the back surface from the end of the section 1 into the hollow portion of the section 1. In the embodiment described later, the back plate is the indoor side surface portion 91 of the reinforcement material 9A.

In the embodiment shown in the lower diagram of Figure 43, of the two bolts S that fix the surface portion 170 of the roller bracket 17 furthest from the widthwise end of section 1 to the indoor side portion of section 1, one bolt S' furthest from the widthwise end of section 1 is fastened to a nut 88 provided on the back surface of the indoor side portion of section 1, thereby fixing the surface portion 170 of the roller bracket 17 to the indoor side portion of section 1. The nut 88 is provided on the back surface of the indoor side portion of section 1 by incorporating a back plate (not shown) with the nut 88 welded to the back surface from the end of section 1 into the hollow portion of section 1. In the embodiment described below, the back plate is the indoor side portion 81 of the reinforcing material 8.

In this embodiment, the interior facing portion 42 of the vertical frame 4 and the interior side surface portion 40' of the inner vertical frame 4' are located at both widthwise ends of the interior side surface portion of section 1, and the upper portion of the interior facing portion 42 of the vertical frame 4 and the upper portion of the interior side surface portion 40' of the inner vertical frame 4' are fixed to the interior side surface portion 22 of the upper frame 2 of section 1. The surface portion 170 of the roller bracket (top roller bracket) 17 of the top section 1' in this embodiment is fixed with four bolts S to the interior facing portion 42 of the vertical frame 4 and the interior side surface portion 22 of the upper frame 2, the interior side surface portion 40' of the inner vertical frame 4' and the interior side surface portion 22 of the upper frame 2.

As shown in FIG. 5, the four bolts S are located on the vertices of an imaginary diamond, and the interior side surface 22 of the upper frame 2 is located where the upper three bolts S are fixed. Reinforcement material 9 is incorporated in the hollow part of the upper frame 2 of the top section 1' at both ends in the width direction, and the interior side surface 91 of the reinforcement material 9 is located on the back surface of the interior side surface 22 of the upper frame 2. In other words, the upper three bolts S are fixed to the area where the interior facing portion 42 of the vertical frame 4 or the interior surface 40' of the inner vertical frame 4', the interior side surface 22 of the upper frame 2, and the interior side surface 91 of the reinforcement material 9 overlap. The lower bolt S of the four bolts S is fastened to the interior facing portion 42 of the vertical frame 4 and the interior surface 40' of the inner vertical frame 4' by a pop nut.

As shown in FIG. 31, the interior side surface portion 91 of the reinforcement material 9A has a first hole set for fixing the first bracket, which is formed near the first end 95 and consists of three holes located at the vertices of an imaginary triangle. The first hole set consists of a notch 910 for a pop nut, a hole 911 for a pop nut, and an insertion hole 912 for a bolt S, and a nut 97 is fixed by welding to the back surface of the interior side surface portion 91, located on the back surface of the insertion hole 912. One bolt S' (see FIG. 5) of the upper three bolts S is fastened to the nut 97, and the other two bolts S are fastened to pop nuts.

A second set of holes for fixing a second bracket is formed adjacent to the first set of holes on the side away from the first end 95 and consisting of three holes located at the vertices of an imaginary triangle.
The second hole set consists of a hole 911 for a pop nut and insertion holes 912 for two bolts S, and nuts 97 are fixed by welding to the rear surface of the interior side surface portion 91, at positions rearward of the insertion holes 912. Two bolts S' (see FIG. 5) of the upper three bolts S are fastened to nuts 97, and one bolt S is fastened to a pop nut.

As shown in FIG. 33, a first hole set for fixing a first bracket is formed on the interior side surface portion 91 of the reinforcement material 9B near the first end 95, the first hole set being made up of three holes positioned at the apexes of an imaginary triangle. A second hole set for fixing a second bracket is formed adjacent to the first hole set on the side away from the first end 95, the second hole set being made up of three holes positioned at the apexes of an imaginary triangle. Pop nuts are provided in the three holes of each of the first and second hole sets, and the upper three bolts S are fastened to the pop nuts (see FIG. 39).

In this embodiment, the roller bracket of the middle section is also served by the hinge 16. The surface 163 of the first plate 160 on the upper side of the hinge 16 and the surface 165 of the second plate 161 on the lower side form the fixing part that fixes the roller bracket to the indoor side part of section 1, and the raised piece 166 of the second plate 161 forms the support part for the roller shaft 110.

As shown in FIG. 6, the surface 163 of the first plate 160 of the hinge 16 is fixed to the lower portion of the interior facing portion 42 of the vertical frame 4 and the lower portion of the interior surface portion 40' of the inner vertical frame 4' with three bolts S. The upper bolt S is fastened with a pop nut to the lower portion of the interior facing portion 42 of the vertical frame 4 and the lower portion of the interior surface portion 40' of the inner vertical frame 4'.

The interior side surface portion 32 of the bottom frame 3 is located where the two lower bolts S are fixed. Reinforcement material 8 is incorporated into the hollow portion of the bottom frame 3 of section 1 at both ends in the width direction, and the interior side surface portion 81 of the reinforcement material 8 is located on the back surface of the interior side surface portion 32 of the bottom frame 3. In other words, the two lower bolts S are fixed to the area where the interior facing portion 42 of the vertical frame 4 or the interior surface portion 40' of the inner vertical frame 4', the interior side surface portion 32 of the bottom frame 3, and the interior side surface portion 81 of the reinforcement material 8 overlap. As shown in FIG. 25, three pop nut holes 810 are formed in the interior side surface portion 81 of the reinforcement material 8 near the first end 86, and a bolt S' insertion hole 811 is formed on the side away from the first end 86 relative to the hole 810 furthest from the first end 86, and a nut 88 is fixed by welding to the back side of the interior side surface portion 81, located on the back side of the insertion hole 811.

Of the three bolts S that secure the first plate 160 of the hinge 16 to the interior facing portion 42 of the vertical frame 4, the lower two bolts S are fastened to pop nuts provided on the back surface of the interior side portion 81 of the reinforcement material 8. Of the three bolts S that secure the first plate 160 of the hinge 16 to the interior facing portion 40' of the inner vertical frame 4', the bolt S' (see Figure 6) farthest from the end of section 1 is fastened to a nut 88 provided on the back surface of the interior side portion 81 of the reinforcement material 8.

The surface portion 165 of the second plate 161 of the hinge 16 is fixed by three bolts S to the upper portion of the indoor facing portion 42 of the vertical frame 4 and the upper portion of the indoor surface portion 40' of the inner vertical frame 4'. The indoor side surface portion 22 of the upper frame 2 is located at the portion where the upper two bolts S are fixed. In other words, the upper two bolts S are fixed to the portion where the indoor facing portion 42 of the vertical frame 4 or the indoor surface portion 40' of the inner vertical frame 4' and the indoor side surface portion 22 of the upper frame 2 overlap. In this embodiment, the three bolts S are fastened by pop nuts to the upper portion of the indoor facing portion 42 of the vertical frame 4 and the upper portion of the indoor surface portion 40' of the inner vertical frame 4'.

In this embodiment, in the hinge 16 that also serves as a roller bracket, of the 12 bolts S that secure the surface 163 of the first plate 160, which is the fixed portion of the roller bracket, and the surface 165 of the lower second plate 161, to the interior side of section 1, one bolt S' located furthest from the end of section 1 is fastened to a nut 88 welded to the back surface of the interior side 81 of the reinforcing material 8, and the remaining 11 bolts S are fastened to pop nuts.

[O] Side edge shape of the reinforcing part formed on the frame of the section In this embodiment, the reinforcing part 6 protruding on the indoor side portion 32 of the lower frame 3 of section 1, and the reinforcing part 6' protruding on the indoor side portion 22 of the upper frame 2 of top section 1' are both formed by cutting out both end portions from a state in which they are integrally molded to have approximately the same width as the indoor side portions of the lower frame 3 or the upper frame 2, and both widthwise ends of the reinforcing parts 6, 6' do not reach the both end portions of the lower frame 3 and the upper frame 2, and the indoor side portion 32 of the lower frame 3 and the indoor side portion 22 of the upper frame 2 have both side portions 320, 220 that do not have the reinforcing part 6, 6'. That is, the side edges 600, 600' at both ends in the width direction of the reinforcement portion 6, 6' and the portions 320' (cut out flush with the interior side surface portion 32) of the both side portions 320, 220 extending horizontally from the base ends of the side edges 600, 600' are cutout portions. In the cutout portions, the base end portions of the side edges 600, 600' of the reinforcement portion 6, 6' are curved surfaces in plan view, and the corners between the side edges 600, 600' and the both side portions 320, 220 are curved in plan view. In this embodiment, the side edges 600 of the reinforcement portion 6 and the side edges 600' of the reinforcement portion 6' have the same shape in plan view, so that the both side portions 320 of the interior side surface portion of the lower frame 3 of the section 1 and the side edges 600 of the reinforcement portion 6 will be described below.

When the vertically adjacent sections 1 are in a vertical position, the roller shaft 110 of the guide roller 11 is located below the indoor side portion 32 of the lower frame 3 of the upper section 1 (see FIG. 37). The vertically adjacent sections 1 are rotatably connected by hinges 16, 16', and when the vertically adjacent sections 1 are bent from the vertical position, the lower roller shaft approaches the upper indoor side portion 32 (see FIG. 41). Here, in a plan view, the roller shaft 110 extends parallel to and spaced apart from both side portions 320 of the indoor side portion 32, but please note that the distance between the both side portions 320 of the indoor side portion 32 and the roller shaft 110 differs depending on the height position of the section 1 that constitutes the door body D (the protruding dimension of the rising piece 166 of the second plate 161 of the hinge 16 differs depending on the height position of the hinge 16 in the door body D).

When the base end of the roller shaft 110 of the guide roller 11 is closest to the upper indoor side surface portion 32, it must be located closer to the width direction end of section 1 than the vertical plane passing through the first part 601 of the side edge 600. In addition, the indoor side surface portion 42 of the vertical frame 4 and the lower part of the surface portion 40' of the inner vertical frame 4' are fixed to both side portions 320 of the indoor side surface portion 32, and the hinge 16 is fixed to the surface portion 40' of the inner vertical frame 4'. Therefore, the base end of the curved second part 602 of the side edge 600 (the end of both side portions 320 on the side away from the end of section 1) is approximately aligned with the second side surface portion 42' of the inner vertical frame 4' (the rising piece 166 of the second plate 161 of the hinge 16 on the side away from the end of section 1 in a plan view) (see FIG. 40).

In this embodiment, at the side edge 600, 20% or more of the protruding dimension d1 (the distance from the interior side surface 32 to the tip vertical surface 66) of the reinforcing part 6 from the interior side surface 32 is the second part 602. In this embodiment, at the side edge 600, the base end side part of the side edge at both ends of the width direction of the first part 6A of the reinforcing part 6 is the curved second part 602, and more than half of the protruding dimension d2 of the first part 6A from the interior side surface 32 is the second part 602. In FIG. 41, the curved second part 602 of the side edge 600 that can be adopted in the present invention is shown by multiple curved lines according to the dimensions. Specifically, the second part 602 shows arc surfaces (quadrants) of R20, R25, R30, and R35, and the curved second part 602 according to this embodiment is an arc surface (quadrants) of R35.

[P] Locking mechanism of the overhead door One of the intermediate sections 1 is provided with a locking mechanism. The locking mechanism will be described with reference to Figs. 44 to 48. The locking mechanism is composed of a latch 130 that can protrude from the widthwise end of the intermediate section 1, a latch hook 131 located on the guide rail G, and an operation unit 132 that moves the latch 130 between a locked position and an unlocked position. The latch 130 is provided rotatably at both ends in the widthwise direction of the interior side part of the intermediate section 1, and can be rotated between an unlocked position that is located inside the widthwise end of the intermediate section 1 in a plan view, and a locked position that protrudes outward from the widthwise end of the intermediate section 1. When the opening is fully closed, the latch 130 is placed in the locked position, so that the upper end of the latch 130 approaches the lower end of the latch hook 131 from below.

The middle frame 5 is located at the center in the width direction of the middle section 1 equipped with a locking mechanism, and an operating unit 132 is provided on the surface portion 50 of the middle frame 5. The operating unit 132 and the left and right latches 130 are connected by a wire 133, and when the operating unit 132 is in the first position, the latches 130 are in the locked position, and in conjunction with rotating the operating unit 132 from the first position to the second position, the latches 130 rotate from the locked position via the wire 133 to the unlocked position.

The latch 130 in this embodiment is fixed with a bolt to the interior side portion 42 of the vertical frame 4 via the mounting plate 134. In the intermediate section 1 where the locking mechanism is attached, a reinforcing plate 420 is fixed by a fastening member (e.g., a blind rivet) along the height direction to the back surface of the interior side portion 42 of the vertical frame 4 to which the mounting plate 134 is fixed. A bent piece 421 is integrally formed at the widthwise end of the reinforcing plate 420. As shown in Figure 48, a welded nut 422 is provided at a predetermined location on the back surface of the reinforcing plate 420. In this embodiment, four weld nuts 422 are located corresponding to the bolts that fix the mounting plate 134, one weld nut 422 is located at the upper part of the indoor side part 42 corresponding to the lower bolt S' (see FIG. 47) of the second plate 161 of the hinge 16, and one weld nut 422 is located at the lower part of the indoor side part 42 corresponding to the upper bolt S' (see FIG. 47) of the first plate 161 of the hinge 16. The upper and lower ends of the reinforcing plate 420 do not reach the upper and lower ends of the indoor side part 42 of the vertical frame 4, and two holes 423 are formed at the upper end of the reinforcing plate 420 corresponding to the two upper bolts S of the second plate 161 of the hinge 16, and two holes 424 are formed at the lower end of the reinforcing plate 420 corresponding to the two lower bolts S of the first plate 160 of the hinge 16.

[Q] Effects of the overhead door according to this embodiment [Q-1] Shape of the reinforcement part protruding from the interior side surface of the lower frame In order to improve the strength of the section 1 and the door body D, the reinforcement part 6 is protruding from the interior side surface 32 of the lower frame 3. The reinforcement part 6 has a hollow structure and is shaped so that the height dimension increases as it moves away from the interior side surface 32 toward the interior side. This shape is advantageous in terms of the mass-to-strength ratio, and also improves the shape stability as an aluminum extrusion material. The reinforcement part 6 reduces the increase in weight due to its hollow structure, while increasing the cross-sectional area of the tip part on the interior side, and further making the thickness of the tip part (tip vertical surface 66) thicker than the thickness of other parts, thereby effectively ensuring strength relative to the amount of material used. Furthermore, the surface of the reinforcement part 6 consists of an inclined surface, a horizontal surface, and a vertical surface, and does not have any parts such as corners, so that dirt and dust do not accumulate, cleaning is easy, and maintenance is also good. By making the base end portion (first portion 6A) of the reinforcing portion 6 a hollow structure (if it is made into a plate-shaped portion, it cannot be made thick due to molding), the strength of the base end portion of the reinforcing portion 6 can be ensured.

[Q-2] A reinforcing part 6 is protruded from the indoor side surface part 32 of the lower frame 3 of the curved section 1 at the base end side of the side edge of the reinforcing part protruding from the frame, but both widthwise ends of the reinforcing part 6 do not reach both widthwise ends of the lower frame 3, ensuring mounting space for the roller bracket 17. This reinforcing part 6 is formed by cutting out both end portions from a state in which it is integrally molded to have approximately the same width as the indoor side surface part 32 of the lower frame 3, and the indoor side surface part 32 has both side portions 320 that do not have the reinforcing part 6, and the side edges 600 at both widthwise ends of the reinforcing part 6 and the portions of both side portions 320 that extend horizontally from the base ends of the side edges 600 are cutout portions, and there was a risk that stress concentration would occur in these cutout portions, which would hinder the improvement of the strength of the section 1. In this embodiment, the corners (areas where stress is likely to concentrate, for example, where stress concentration is large when cut at a right angle) between the base end side portion (second portion 602) of the side edge 600 of the reinforcing portion 6 and the portions of both side portions 320 in the cutout portion are curved in a plan view, thereby improving the strength of the section 1. Also, the weight increase caused by increasing the R of the curved portion is limited.

The reinforcement 6' protruding from the interior side surface 22 of the upper frame 2 of the top section 1' is formed by cutting out both ends of the reinforcement 6', which is formed by integrally molding the reinforcement 6' with the interior side surface 22 of the upper frame 2 with approximately the same width as the interior side surface 22 of the upper frame 2, as well as the reinforcement 6 protruding from the interior side surface 32 of the lower frame 3. The interior side surface 22 has both side portions 220 that do not have the reinforcement 6', and the side edges 600' at both ends of the width direction of the reinforcement 6' and the portions of the both side portions 220 that extend horizontally from the base ends of the side edges 600' are cutouts. In this embodiment, the corners (parts where stress is likely to concentrate, for example, when cut out at a right angle) between the base end side portion (second portion 602') of the side edge 600' of the reinforcement 6' and the both side portions 220 are curved in plan view in the cutouts, thereby improving the strength of the top section 1'. In addition, the weight increase due to the increase in R of the curved portion is limited.

[Q-3] Attachment that can be attached to the tip of the reinforcement part protruding from the interior side part of the lower frame In this embodiment, in order to improve the wind pressure resistance of the section 1 of the overhead door, the projection dimension of the lower frame 3 (reinforcement part 6) is increased to the maximum size that can be manufactured, but depending on the site, there is a possibility that the required strength cannot be satisfied. If the plate thickness of the lower frame 3 including the reinforcement part 6 is increased for the purpose of improving the strength, the design range will be reduced due to the increase in weight, and problems may occur in terms of product cost. An attachment 7 that can be attached to the tip of the reinforcement part 6 protruding from the interior side part 32 of the lower frame 3 is prepared, and by attaching the attachment 7 to the tip part, the tip side of the reinforcement part 6 can be extended so as to be separated from the interior side part 32. Since the method of attaching the attachment 7 is superior to the method of increasing the plate thickness in terms of mass-to-strength ratio, the use of the attachment 7 makes it possible to improve the strength of the section 1 while minimizing the increase in weight. By preparing multiple types of attachments 7 with different dimensions and shapes, different attachments can be selected to meet the strength required on-site, thereby improving the expandability of section 1.

By making the attachment 7 a long member with a roughly U-shaped cross section consisting of the front surface 70, the top surface 71, and the bottom surface 72, the attachment 7 can be easily attached to the tip of the reinforcing part 6 by sandwiching the tip portion. Furthermore, by providing positioning pieces 73, 74 on the bottom surface of the top surface 71 and the top surface of the bottom surface 72 of the attachment 7, the workability of installation is improved. In addition, the U-shaped cross section of the attachment 7 can follow the dimensional accuracy and bending of the lower frame 3.

[Q-4] Connection structure between the lower part of the middle frame and the lower frame When the lower part 501 of the middle frame 5 is fixed to the hollow lower frame 3, for example, a brand rivet is used. As described above, in this embodiment, in order to improve the strength of the section 1, a hollow reinforcement part 6 is protruded toward the interior side of the interior side part 32 of the lower frame 3 across the width direction of the section, and this reinforcement part 6 has an upper inclined surface 61 that extends diagonally upward toward the interior side, and the height dimension gradually increases in the direction away from the interior side part. This shape of the reinforcement part 6 is advantageous in terms of the mass-to-strength ratio. However, since the height of the interior side part 32 of the lower frame 3 is lower than the tip part of the reinforcement part 6, it is difficult to drill holes from the interior side using normal equipment (drilling holes in the interior side part 32 of the lower frame 3 to attach the rivet).

In this embodiment, the interior side portion 32 is extended upward to form a rising piece (consisting of a vertical edge 35 and a horizontal piece 36) on the upper surface portion 30 of the lower frame 3, making it possible to set the fastening portion of the fastening member (e.g., a brand rivet) above the upper surface portion 32 of the lower frame 3, and making it possible to easily perform hole processing in the vertical piece 35 of the rising piece. This hole processing can be performed not only from the inside of the room but also from the outside of the room. Forming the rising piece limits the increase in weight compared to increasing the overall height dimension of the lower frame 3. The lower portion 501 of the middle frame 5 is in contact with the vertical piece 35 of the rising piece at the upper side and the interior side portion 32 of the lower frame 3 at the lower side, and the upper side (a position farther from the lower end of the middle frame 5) is the fastening portion, so the strength is improved compared to when fastening at the lower side (a position closer to the lower end of the middle frame 5). The rising piece in this embodiment has a horizontal piece 36 integrally formed at the upper end, and the lower ends of the first side portion 51 and the second side portion 52, which are the left and right projecting surfaces of the center frame 5, are close to or in contact with the horizontal piece 36, so that when the section 1 is deformed, the horizontal piece 36 of the rising piece abuts against and supports the lower ends of the first side portion 51 and the second side portion 52 of the center frame 5.

[Q-5] Reinforcement material incorporated in the hollow of the lower frame of the section, reinforcement material incorporated in the hollow of the upper frame of the top panel A reinforcement section 6 is protruded from the interior side surface section 32 of the lower frame 3 of section 1, but both ends of the reinforcement section 6 in the width direction do not reach both ends of the lower frame 3 in the width direction, and mounting space for the roller bracket 17 is secured. This reinforcement section 6 is formed by cutting out both ends of the interior side surface section 32 of the lower frame 3 from a state in which it is integrally molded with approximately the same width, and the interior side surface section 32 has both side portions 320 that do not have the reinforcement section 6, and the side edges 600 at both ends of the reinforcement section 6 and the parts of both side portions 320 that extend horizontally from the base ends of the side edges 600 are cutout portions, and there was a risk that stress concentration would occur in these cutout portions, which would hinder the improvement of the strength of section 1.

The strength of section 1 is improved by incorporating reinforcing material 8 into the hollow portion of bottom frame 3 at least over the inner surface of both side portions 320, and by making the length of reinforcing material 8 such that the second end 87 of reinforcing material 8 extends beyond the corners of both side portions 320 and the side edge 600 of reinforcing portion 6. In this embodiment, reinforcing material 8 is incorporated into both ends of the hollow portion of bottom frame 3 in the longitudinal direction, thereby improving the strength of section 1 while minimizing the increase in weight due to the addition of reinforcing material 8. The reinforcing material 8 incorporated into the hollow portion of bottom frame 3 is not a hollow type, but has an opening extending in the longitudinal direction, so that the reinforcing material 8 has a shape that easily deforms in response to the deformation and twisting of bottom frame 3 when it is subjected to wind pressure, and stress concentration on the reinforced member (bottom frame 3) generated by reinforcing material 8 can be suppressed.

The reinforcing portion 6' protruding from the interior side portion 22 of the upper frame 2 of the top section 1' is formed by cutting out both end portions from a state where it is integrally molded to have approximately the same width as the interior side portion 22 of the upper frame 2, similar to the reinforcing portion 6 protruding from the interior side portion 32 of the lower frame 3. The interior side portion 22 has both side portions 220 that do not have the reinforcing portion 6', and the side edges 600' at both widthwise ends of the reinforcing portion 6' and the portions of both side portions 220 that extend horizontally from the base ends of the side edges 600' are cut-out portions, and there was a risk that stress concentration would occur in these cut-out portions, which would hinder the improvement of the strength of the top section 1'.

The strength of the top section 1' is improved by incorporating the reinforcing material 9 into the hollow section of the upper frame 2 at least over the inner surface of both side sections 220, and by making the length of the reinforcing material 9 such that the second end 96 of the reinforcing material 9 extends beyond the corners of both side sections 220 and the side edge 600' of the reinforcing section 6'. In this embodiment, the strength of the top section 1' is improved while minimizing the weight increase due to the addition of the reinforcing material 9 by incorporating the reinforcing material 9 into both ends of the hollow section of the upper frame 2. The reinforcing material 9 incorporated into the hollow section of the upper frame 2 is not a hollow type, but has an opening extending in the longitudinal direction, so that the reinforcing material 9 has a shape that easily deforms in response to the deformation of the upper frame 2, and stress concentration on the reinforced member (upper frame 2) generated by the reinforcing material 9 can be suppressed.

[Q-6] Mounting structure of roller bracket using welded nut The roller bracket 17 supporting the roller shaft 110 of the guide roller 11 provided at both widthwise ends of the section 1 of the overhead door is fixed to the upper and lower parts of the interior side part of the section 1 with bolts, but since the upper and lower parts of the interior side part of the section 1 are fixed to the hollow upper frame 2 and lower frame 3, the bolts fixing the roller bracket 17 are generally fastened to pop nuts. When a large wind pressure acts on the section 1, a force acts on the section 1 to tilt the roller shaft 110 with the guide roller 11 abutting against the inner surface of the guide rail G as the section 1 deforms, and this force acts on the roller bracket 17 and the fixed part of the interior side part of the section 1. At this time, the strength of the mounting part of the roller bracket depends on the pull-out strength of the pop nut, but the pull-out strength of the pop nut may not necessarily be sufficient (see the right side of the upper figure of Figure 42 and the right side of the upper figure of Figure 43).

By replacing at least some of the pop nuts (including the parts where a larger force acts, for example at least the pop nuts located furthest from the widthwise end of section 1) with weld nuts 88, 97 welded to the back plate, the strength of the roller bracket mounting portion is improved (see the right side of the lower diagram of Figure 42 and the right side of the lower diagram of Figure 43). The back plate on which the weld nuts 88, 97 are provided can also be used by the indoor side parts 81, 91 of the reinforcement members 8 and 9A, and in an embodiment in which the reinforcement members 8 and 9A are provided in the hollow parts of the lower frame 3 and upper frame 2, the weld nuts 88, 97 can be used without increasing the number of parts (without preparing a special back plate).

[Q-7] When the door body D of a center-frame overhead door that is closely arranged near the center of the section in the width direction is subjected to high wind pressure, the center part of each section 1 in the width direction may bend or a force may be applied to cause the center part of each section 1 in the width direction to expand vertically, which may cause the components that make up each section 1 (upper frame 2, lower frame 3, main body 10, etc.) to deform or the fastening parts to come loose.

In this embodiment, in a section 1 having a main body 10, left and right vertical frames 4, inner vertical frames 4', upper frame 2, lower frame 3, and multiple center frames 5 arranged to span the upper frames 3 and lower frames 3, the center frames 5 are densely arranged in the center of the width direction (area that is more likely to bend when subjected to wind pressure) compared to both ends of each section 1 in the width direction, thereby suppressing the vertical opening of the section 1 and preventing as much as possible the risk of deformation of the members constituting each section 1 (upper frame 2, lower frame 3, main body 10, etc.) and of fastening parts coming loose. Depending on the material of the main body 10 of the section 1 and the strength required for the section 1, the required number of center frames 5 can be appropriately incorporated, making it possible to improve the strength of the section while minimizing the weight increase associated with the addition of center frames 5.

[Q-8] Vertical frame of middle section equipped with locking device By providing a reinforcing plate 420 on the back surface of the interior facing portion 42 of the vertical frame 4 of the middle section 1 equipped with a locking device, the strength of the middle section 1 can be improved. The strength of the reinforcing plate 420 is improved by integrally forming a bent piece (rib) 421 at both ends in the width direction of the reinforcing plate 420. Furthermore, a nut 422 is welded to a predetermined location on the back surface of the reinforcing plate 420, and a bolt that fixes the mounting plate 134 of the latch 130 to the interior facing portion 42 of the vertical frame 4 is fastened to the nut 422. The strength of the fastening portion when the bolt is fastened to the weld nut 422 is improved compared to the strength of the fastening portion when the bolt is fastened to a pop nut. In addition, by replacing one of the pop nuts to which the multiple bolts that secure the hinge 16 to the interior facing portion 42 of the vertical frame 4 are fastened with a welded nut 422 provided on the reinforcing plate 420, the stress acting on the fastening portion of the hinge 16 can be distributed.

Reference Signs List 1 Section 1' Top section 2 Upper frame 3 Lower frame 4 Vertical frame 4' Inner vertical frame 5 Center frame 6 Reinforcement section 6' Reinforcement section 7 Attachment 8 Reinforcement material 9 Reinforcement material 9A Reinforcement material 9B Reinforcement material 10 Main body 11 Guide roller 110 Roller shaft 16 Hinge 17 Roller bracket

Claims (2)

In an overhead door body formed by connecting a plurality of sections in the height direction,
Each section includes a main body, left and right vertical frames, an upper end portion, a lower end portion, and a plurality of center frames extending between the upper end portion and the lower end portion.
The center frames are arranged closer to the center in the width direction than to both ends in the width direction of each section,
The plurality of center frames are arranged at equal intervals in the width direction of the section, and include a plurality of first center frames equipped with hinges for connecting adjacent sections vertically;
A plurality of second center frames are disposed between the plurality of first center frames located in the center portion in the width direction, and have no hinges attached thereto;
Consists of :
Overhead door body. In each section, the second stiles are two or three.
2. The overhead door according to claim 1 .

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